Antioxidant Activity Of 2,6,4' - Trihydroxy -4-Methoxy Benzophenone From Ethyl Acetate Extract Of Leaves of Mahkota Dewa (Paleria macrocarpa (Scheff.) Boerl.). - Susilowati, Sabirin matsjeh, Harno Dwi Pranowo, Chairil Anwar. (J. Indo. Jour. Chem., XI ( 2) 2011 : 180-185)